I was listening to a mixset from Moby in iTunes today and noticed a few cool things about this M4A file which I would really like to know how to do on my own.
- The file has some type of embedded URL, so that in the "Now Playing" window, there is a nice little link to Moby's webpage.
- The file also has album art which changes for the current track in the mix, and it updates iTunes' status panel to show the track artist and name.
- None of this stuff seems to be visible anywhere in the "Get Info" section of the track.
How can I make my M4A mixes do this? Is there some sort of special utility that I need for this?